<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <form action="post" action="http://www.haosou.com/">
    <button>提交</button>
    </form>
    <form method="get" action="http://www.haosou.com/">
    <button>提交</button>
    </form>
    <form autocomplete="off" action="http://www.haosou.com/">
    <button>提交</button>
    </form>
    <form target="_blank" action="http://www.haosou.com/">
    <button>提交</button>
    <input name ="user">
    <input name ="user" autofocus>
    <input name ="user" disabled> 
    <input name ="user" autofocus="off">
    <input name ="eamil" form="register">

    <p><label for="user">用户名:<input id="user" name="user"></label></p>

</form>
<form method="get" id="register">
    <fieldset>名字
        <legend>注册表单</legend>
        <button type="submit"></button>
        <button type="submit">提交</button>
        <button type="reset">重置</button>
        <button type="button">按钮</button>
        <button type="submit" form="register">提交</button>
    </fieldset>

</form>

<form action="">

    <select name="fruit" >
        <option value="1">苹果</option>
        <option value="2">橘子</option>
        <option value="3">香蕉</option>

        <option value="2" selected>橘子</option>

        <option label="水果类"></option>
        <option value="1">苹果</option>
        <option value="2" selected>橘子</option>
        <option value="3" label="香蕉">香蕉</option>
        <textarea name="content" id="" cols="30" rows="10">请留下你的建议</textarea>
        <form oninput="res.value = num1.valueAsNumber * num2.valueAsNumber">
        <input type="number" id="num1">x<input type="number" id="num2">
        <output for="num1 num2" name="res"></output>
        <input type="text" required>
        <input type="number" min="10" max="100">
        <input type="text" placeholder="请输入区号+座机" required
               pattern="^[\d]{2,4}\[\d]{6,8}$">

        <form action="http://www.baidu.com/" novalidate>

        </form>
    </select>


</form>
<form action="">
    <input type="text">
    <input type="text" size="50">
    <input type="text" maxlength="10">
    <input type="text" value="初始值">
    <input type="text" placeholder="请输入内容">
    <input list="footlist">

    <datalist>
        <option value="苹果">苹果</option>
        <option value="橘子">橘子</option>
        <option value="香蕉" label="香蕉"></option>
        <option value="梨子"></option>
    </datalist>
    <input type="text" readonly>
    <input type="text " disabled>
    <input type="text" password>
    <input type="search">
    <input type="number">
    <input type=" range">
    <input type="number" step="2" min="10" max="100">

    <input type="date">
    <input type="month">
    <input type="time">
    <input type="week">
    <input type="datetime">
    <input type="datetime-local">

    <input type="color">

    <input type="checkbox">
    <input type="checkbox">

    <input type="radio" name="男">男
    <input type="radio" name="sex" value="女">女

    <input type="checkbox" name="music" checked value="1">
    <input type="submit">
    <input type="image" src="img,png">

    <input type="email">
    <input type="tel">
    <input type="url">

    <input type="file">
    <input accept="image/gif,image/jpeg,image/png">
</form>

</body>
</html>